Are there nonstop flights from London (LHR) to Kaunas (KUN)?

No. The fastest connection is via Copenhagen, about 3h of total flying time.

What is the fastest connection from London (LHR) to Kaunas (KUN)?

via Copenhagen ≈ 3h, via Gothenburg ≈ 3h 10m, via Stockholm ≈ 3h 28m (estimated flying time, excluding layovers).

London Heathrow Airport (LHR) to Kaunas International Airport (KUN)・1,670 km

No nonstop flights. The fastest connection is via Copenhagen (CPH), about 3h of flying time (layover not included).

None.

11 one-stop options, sorted by estimated flying time. Tap one to see the airlines on each leg and booking links.

Times are estimated from distance. Check schedules, frequency and availability with the airline or a booking site.